121505055230661 has 8 divisors (see below), whose sum is σ = 162006956265504. Its totient is φ = 81003262174800.

The previous prime is 121505055230641. The next prime is 121505055230681. The reversal of 121505055230661 is 166032550505121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121505055230641) and next prime (121505055230681).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121505055230661 - 2⁶ = 121505055230597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121505055230621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24331591 + ... + 28896996.

It is an arithmetic number, because the mean of its divisors is an integer number (20250869533188).

Almost surely, 2^{121505055230661} is an apocalyptic number.

It is an amenable number.

121505055230661 is a deficient number, since it is larger than the sum of its proper divisors (40501901034843).

121505055230661 is an equidigital number, since it uses as much as digits as its factorization.

121505055230661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53989491.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 121505055230661 in words is "one hundred twenty-one trillion, five hundred five billion, fifty-five million, two hundred thirty thousand, six hundred sixty-one".